Table 3.

Locations of IVD herniation at each cervical level by gender.

		Central	Left posterolateral	Right posterolateral	Foraminal	Diffuse bulge	Number of patients
C2–C3	Male	2.1	0.3	0.2	0.0	1.7	2402
	Female	1.4	0.1	0.1	0.0	1.3	3737
C3–C4	Male	37.4	3.7	3.3	0.3	19.4	2402
	Female	33.0	1.7	1.8	0.2	19.3	3737
C4–C5	Male	43.5	5.2	4.3	0.3	18.9	2402
	Female	36.0	4.3	4.2	0.2	20.4	3737
C5–C6	Male	32.3	10.9	10.7	0.3	22.1	2402
	Female	30.4	9.6	7.5	0.2	22.5	3737
C6–C7	Male	20.0	9.7	8.3	0.2	25.1	2402
	Female	19.8	6.2	5.1	0.2	24.8	3737

Values are percentages. (P<.001).